If the CPS starts going bad I realize that starting the engine becomes more difficult.Does this also figure in with the overall running of the engine,such as timing?Ive checked my CPS on my 89 4.0 and it reads 380 ohms resistance.I beleive this is means its starting to go bad,would this also make it idle rough?

CPS? What part are you talking about? TPS?

OOPS!!!Crank position sensor!

I feel stupid, Yes it could make it run rough, if you checked it and its out of the tolerance, than I would replace it. Not sure how involved it is, let me know how it goes.

OOPS!!!Crank position sensor!
give year make and engine Dale jeepman600@sbcglobal.net

give year make and engine Dale jeepman600@sbcglobal.net
1989 jeep cherokee 4.0L

If the CPS starts going bad I realize that starting the engine becomes more difficult.Does this also figure in with the overall running of the engine,such as timing?Ive checked my CPS on my 89 4.0 and it reads 380 ohms resistance.I beleive this is means its starting to go bad,would this also make it idle rough?

Ohms early 4.0's 125- 275ohms at terminals A & B on ignition control module mounted on shock tower. Dale jeepman600@sbcglobal :2cents:

my 90' 4.0l L6 takes a while to crank over. could it be that too?? i just have delt with it. not know what it was! Thanks Justin

my 90' 4.0l L6 takes a while to crank over. could it be that too?? i just have delt with it. not know what it was! Thanks Justin

Hi, possibbly , how long has it been since a full tuneup,--plugs, plug wires cap and rotor. Air filter change. Plus throttlebody cleaning.
Dale jeepman600@sbcglobal.net